package cn.chencq.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.MDC;

import cn.chencq.utils.IdGen;

/**
 * 
 * 请求参数校验操作
 * 
 * @author chencq
 * @email chenchaoqun@incar100.com
 * 
 */
public class RequestFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {

	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) resp;

		// 请求ID
		String rid = IdGen.uuid();
		MDC.put("rid", rid);

		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {

	}
}
